1969 Map of No Heart Creek SW

About this map

The vast waters of Lake Oahe dominate this landscape, following the completion of the Oahe Dam and the resulting inundation of the historic river valleys. This 1969 field-checked survey captures the transformed geography where the Cheyenne River and Missouri River meet. The northern portion of the sheet is defined by the Cheyenne River Indian Reservation Boundary, marking a significant cultural and administrative border in central South Dakota. The topography is characterized by a series of deeply incised drainage systems, including No Heart Creek, Tall Prairie Chicken Creek, and Charlie Creek, which now form jagged inlets along the reservoir's western shore. These named creeks and the intricate shoreline provide a detailed record of the landforms at the intersection of Dewey, Sully, and Stanley counties during the late twentieth century.